I agree with magic_glitter. You might have an intolerance to grains. Dr Mercola recommends a no grain diet. If you have dark circles under your eye that is a good indication as well as other digestive problems.
Chappatti is south indian flatbread using wheat flour that is allowed to ferment overnight. This allows some of the gluten to break down through bacterial action. Even this is hard for me but better than commercial bread. If you still want to eat grain you can try sprouted grain breads or tortillas like ezekial.
I believe your excessive thirst is due to the grains and refined sugars in the diet. If you make dietary changes take it slow as it takes time for the body to adjust.